Bm. Choudary et al., ACYLATION OF AROMATIC ETHERS WITH ACID ANHYDRIDES IN THE PRESENCE OF CATION-EXCHANGED CLAYS, Applied catalysis. A, General, 171(1), 1998, pp. 155-160
Friedel-Crafts acylation of aromatic ethers with acid anhydrides in th
e presence of mesoporous material, cation-exchanged K10 montmorillonit
e (Mn+ - mont., where Mn+=Fe3+, Zn2+, Cu2+, Al3+ and Co2+) was investi
gated. Fe3+- and Zn2+-exchanged montmorillonites displayed higher acti
vities ascribed to the synergistic effect of Bronsted and Lewis acidit
ies. Selective acylation is a significant achievement with the formati
on of 1-acyl-2-methoxynaphthalene, 4-acyl anisole and 4-acyl veratrole
from respective aromatic ethers. (C) 1998 Elsevier Science B.V. All r
ights reserved.